2: The Web of Human Behavior
Now for what I call the Web of Human Behavior. You could also call it the Theory of Human Evolutionary Behavior.
If you’re an evolutionary psychologist, this is going to sound like it was written by a cave man. As I said, I limit my vocabulary to words the general public can understand.
Emotion is a more powerful motivator by far than intellect. Emotional communication is more powerful by far than intellectual communication. And theatre turns emotional communication into a fine art.
Humans evolved as one species because the same set of biological laws affected all of our ancestors equally for all of our evolution. If our ancestors had been affected by different sets of biological laws, we would’ve evolved as multiple species. By now, that set of biological laws is written into our DNA, because everyone who didn’t feel like following them died out—natural selection.
All animal behavior, and consequently all human behavior, revolves around one thing: The attempt by the individual to preserve the survival of his or her DNA by the most effective means perceivable to him or her.
People engage in all kinds of activity that doesn’t seem to have anything to do with preserving the survival of their DNA. I never said that it did. I said that all human behavior revolves around the individual’s perception of offering him the most effective means of preserving the survival of his DNA.
All human emotions serve very specific functions in the original conditions of our evolution. Emotions cause psychological effects in people that give them their perceptions that certain courses of action offer the most effective means to preserve the survival of their DNA. Emotions also cause physiological effects in people that prepare them physically for that course of action.
For example, when people are faced with some overwhelming threat to their safety, they feel afraid. That fear causes them to want to run away, which is usually the best way to survive an overwhelming threat. It also makes them feel cold because it diverts a lot of blood to their legs to help them run.
For another example, things that make people feel disgusted cause them to gag, lose their appetite, and flare their nostrils, because for most of human evolution that was the best way people had to keep from eating rotten food. We all do it now because everyone who didn’t do it died from food poisoning. Even if you flare your nostrils, gag, and lose your appetite whenever you think about your ex-boyfriend or ex-girlfriend, you feel disgusted and you react the same way because on some level, the thing that your brain is best equipped to compare that person to is rotten food, and that reaction works well enough that natural selection hasn’t adapted a more specialized reaction.
And so on…
Emotions evolved in the original conditions of our evolution, but we don’t live in the original conditions of our evolution. That’s why people’s perceptions of the most effective means of preserving the survival of their DNA are so often misled.









